This map shows the region of Kasei Valles, lying approximately between 21° and 28° North at 292.5° East. Connecting the Southern Echus Chasma and the plain Chryse Planitia to the east, Kasei Valles has a width of roughly 500 kilometres and, if Echus Chasma is included, extends for approximately 2500 kilometres. Both the North and South valley branches indicated in the map exhibit a depth of 2900 metres.